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Finding the Fourth Proportional to 424,997.52, 637,612.70 and 125,478

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Solution

The fourth proportional to 424,997.52, 637,612.70 and 125,478 is: 188,251.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,997.52 : 637,612.70 = 125,478 : x
  2. Step 2: Convert to fraction form
    424,997.52/637,612.70 = 125,478/x
  3. Step 3: Cross multiply
    424,997.52x = 637,612.70 × 125,478
  4. Step 4: Simplify right side
    424,997.52x = 80,006,366,370.60
  5. Step 5: Solve for x
    x = 80,006,366,370.60/424,997.52
  6. Step 6: Final answer
    x = 188,251.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.